Observation of Isomeric Decays in the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>r</mml:mi></mml:math>-Process Waiting-Point Nucleus<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mmultiscripts><mml:mi>Cd</mml:mi><mml:mn>82</mml:mn><mml:none/><mml:mprescripts/><mml:none/><mml:mn>130</mml:mn></mml:mmultiscripts></mml:math>
A. JungclausDepartamento de Física Teórica, Universidad Autónoma de Madrid, E-28049 Madrid, SpainL. CáceresDepartamento de Física Teórica, Universidad Autónoma de Madrid, E-28049 Madrid, SpainM. GórskaM. PfütznerIEP, Warsaw University, PL-00681 Warsaw, PolandS. PiétriDepartment of Physics, University of Surrey, Guildford, GU2 7XH, United KingdomE. Werner-MalentoIEP, Warsaw University, PL-00681 Warsaw, PolandH. GraweK. LangankeG. Martı́nez-PinedoF. NowackiIReS, IN2P3-CNRS/Université Louis Pasteur, F-67037 Strasbourg, FranceA. PovesDepartamento de Física Teórica, Universidad Autónoma de Madrid, E-28049 Madrid, SpainJ. J. Cuenca-GarcíaD. RudolphDepartment of Physics, Lund University, S-22100 Lund, SwedenZ PodolyákDepartment of Physics, University of Surrey, Guildford, GU2 7XH, United KingdomP. H. ReganDepartment of Physics, University of Surrey, Guildford, GU2 7XH, United KingdomP. DetistovFaculty of Physics, University of Sofia, BG-1164 Sofia, BulgariaS. LalkovskiFaculty of Physics, University of Sofia, BG-1164 Sofia, BulgariaV. ModamioDepartamento de Física Teórica, Universidad Autónoma de Madrid, E-28049 Madrid, SpainJoel W. WalkerDepartamento de Física Teórica, Universidad Autónoma de Madrid, E-28049 Madrid, SpainP. BednarczykGesellschaft für Schwerionenforschung (GSI), D-64291 Darmstadt, GermanyP. DoornenbalH. GeißelJ. GerlJ. GrȩboszGesellschaft für Schwerionenforschung (GSI), D-64291 Darmstadt, GermanyI. KojouharovN. KurzW. ProkopowiczH. SchaffnerH. J. WollersheimK. AndgrenKTH Stockholm, S-10691 Stockholm, SwedenJ. BenlliureUniversidad de Santiago de Compostela, E-175706 Santiago de Compostela, SpainG. BenzoniINFN, Universitádegli Studi di Milano and INFN Sezione di Milano, I-20133 Milano, ItalyA. M. BruceSchool of Engineering, University of Brighton, Brighton, BN2 4GJ, United KingdomE. CasarejosUniversidad de Santiago de Compostela, E-175706 Santiago de Compostela, SpainB. CederwallKTH Stockholm, S-10691 Stockholm, SwedenF. C. L. CrespiINFN, Universitádegli Studi di Milano and INFN Sezione di Milano, I-20133 Milano, ItalyB. HadiniaKTH Stockholm, S-10691 Stockholm, SwedenM. HellströmDepartment of Physics, Lund University, S-22100 Lund, SwedenR. HoischenDepartment of Physics, Lund University, S-22100 Lund, SwedenG. IlieInstitut für Kernphysik, Universität zu Köln, D-50937 Köln, GermanyJ. JolieInstitut für Kernphysik, Universität zu Köln, D-50937 Köln, GermanyA. KhaplanovKTH Stockholm, S-10691 Stockholm, SwedenM. KmiecikThe Henryk Niewodniczański Institute of Nuclear Physics, PL-31342 Cracow, PolandR. KumarInter University Accelerator Centre, New Delhi, IndiaA. MajThe Henryk Niewodniczański Institute of Nuclear Physics, PL-31342 Cracow, PolandS. MandalUniversity of Delhi, New Delhi, IndiaF. MontesS. MyalskiThe Henryk Niewodniczański Institute of Nuclear Physics, PL-31342 Cracow, PolandG. S. SimpsonLPSC, Université Joseph Fourier Grenoble 1, CNRS/IN2P3, Institut National Polytechnique de Grenoble, F-38026 Grenoble Cedex, FranceS. J. SteerDepartment of Physics, University of Surrey, Guildford, GU2 7XH, United KingdomS. TashenovO. WielandINFN, Universitádegli Studi di Milano and INFN Sezione di Milano, I-20133 Milano, Italy
2007lv
ABI
Аннотация
The gamma decay of excited states in the waiting-point nucleus (130)Cd(82) has been observed for the first time. An 8(+) two-quasiparticle isomer has been populated both in the fragmentation of a (136)Xe beam as well as in projectile fission of 238U, making (130)Cd the most neutron-rich N = 82 isotone for which information about excited states is available. The results, interpreted using state-of-the-art nuclear shell-model calculations, show no evidence of an N = 82 shell quenching at Z = 48. They allow us to follow nuclear isomerism throughout a full major neutron shell from (98)Cd(50) to (130)Cd(82) and reveal, in comparison with (76)Ni(48) one major proton shell below, an apparently abnormal scaling of nuclear two-body interactions.
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